Witnesses told The Post that Jermain Rodriguez Munguia, 18, was drying off a Ford Explorer at about 1 p.m. in Crown Heights when the white Rolls – driven by a fellow worker – came out of the car wash, sped up and smashed into him.

The Mexican immigrant was killed instantly as, witnesses said, the Rolls kept revving and pushing into his body, which was pinned against the back of the Explorer.

The Rolls then crossed over Maple Street and smashed head-on into a brick wall.

Police said they were questioning the worker who was behind the wheel but are treating the bizarre tragedy as an accident.

Utica Car Wash and Lube owner Bharat Jotwani said, “I’m in shock because a life has been lost. He is a human being coming here to make a life for himself.”

Jotwani said the driver of the rampaging Rolls was a colleague who had worked at the car wash for three months.

Munguia has lived with his uncle above the car wash for the past six months since moving to New York from his small hometown of San Pedro, Mexico.

“He was a great kid, a very hard worker, ” said his uncle Juan Flores.

“We don’t have the money to send his body back to Mexico, and we need help.”